[Bug 74492] New: v3.13-rc8 nv4e + msi = random lockups

[Bug 74492] New: v3.13-rc8 nv4e + msi = random lockups

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https://bugs.freedesktop.org/show_bug.cgi?id=74492

          Priority: medium
            Bug ID: 74492
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
           Summary: v3.13-rc8 nv4e + msi = random lockups
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: ronald645-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
          Hardware: Other
            Status: NEW
           Version: git
         Component: Driver/nouveau
           Product: xorg

Created attachment 93341
  --> https://bugs.freedesktop.org/attachment.cgi?id=93341&action=edit
Full dmesg of a clean boot

Kind of looks like bug #73445.

For me, it happens:

- almost at random with intervals of hours ranging to days (dammit...)
- not (yet) in OpenGL apps (I don't play games anymore)
- hangs in firefox , evince
- happens while scrolling but also happens during 'stationary' display

The symptoms are:

- relatively small corruption (10 %) which changes over time somewhat slightly
- disk writes only happen in periodic spurs with long pauses (SysRQ + S) did
not help

Eventually I'm dumped to terminal with an oops, but I don't see anything
nouveau related in there. Attaching it anyway.

nouveau.config=NvMSI=0 'fixes' it. Or let me put it this way: It never occurred
while using this parameter.

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[Bug 74492] v3.13-rc8 nv4e + msi = random lockups

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https://bugs.freedesktop.org/show_bug.cgi?id=74492

--- Comment #1 from Ronald <ronald645-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 93342
  --> https://bugs.freedesktop.org/attachment.cgi?id=93342&action=edit
Screenshot of garbled OOPS

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[Bug 74492] v3.13-rc8 nv4e + msi = random lockups

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https://bugs.freedesktop.org/show_bug.cgi?id=74492

--- Comment #2 from Ronald <ronald645-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
I forgot to rotate the photo, but it's also unreadable. Sorry about that.

Oopses occur even after the switch to TTY. So this is is probably not even the
first one.

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[Bug 74492] v3.13-rc8 nv4e + msi = random lockups

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https://bugs.freedesktop.org/show_bug.cgi?id=74492

--- Comment #3 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Yes, probably the same thing as that bug, although unfortunately the bug filer
from #73445 never responded to my suggestion.

Definitely sounds like something IRQ-ish is going bad. I think the ultimate
resolution will be to just disable MSI on nv4e, but if you don't mind, could
you attach the output of

# lspci -vvvnn
# cat /proc/interrupts

(Run as root -- well, really just the lspci bit needs root.)

for both the NvMSI=0 case as well as the default case. Even more ideally, do
this when the corruption begins (for when MSI is enabled). Also, can you attach
a dmesg of a boot without NvMSI=0? Do you see funny interrupt errors in dmesg
(like "irq 16 nobody cared" sort of thing)?

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[Bug 74492] v3.13-rc8 nv4e + msi = random lockups

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https://bugs.freedesktop.org/show_bug.cgi?id=74492

--- Comment #4 from Ronald <ronald645-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 93343
  --> https://bugs.freedesktop.org/attachment.cgi?id=93343&action=edit
Logs without msi

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[Bug 74492] v3.13-rc8 nv4e + msi = random lockups

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https://bugs.freedesktop.org/show_bug.cgi?id=74492

--- Comment #5 from Ronald <ronald645-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 93344
  --> https://bugs.freedesktop.org/attachment.cgi?id=93344&action=edit
Logs with msi

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[Bug 74492] v3.13-rc8 nv4e + msi = random lockups

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https://bugs.freedesktop.org/show_bug.cgi?id=74492

--- Comment #6 from Ronald <ronald645-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 93345
  --> https://bugs.freedesktop.org/attachment.cgi?id=93345&action=edit
Logs directly after corruption in tty

I managed to reproduce it. I think it's reliable, but that will have to wait. I
have to go in 30 minutes.

I was able to reproduce it by scrolling like a madmen in tty2. It was just a
guess =) .

However, nouveau seems to be the quiet type:

[  122.487034] nouveau E[     DRM] GPU lockup - switching to software fbcon

log_msi=1.txt is the logs without corruption
corrupt.txt is the logs with corruption
log_msi=0.txt is a clean boot

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[Bug 74492] v3.13-rc8 nv4e + msi = random lockups

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--- Comment #7 from Ronald <ronald645-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
I don't see messages about irq's and all.

The nice thing about the tty lockup is that the system is actually still
responsive.

However, reproducing is sometimes difficult. I also checked if it triggered
under NvMSI=0 (in case this is a separate issue) and I was not able to
reproduce it.

Any pointers?

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[Bug 74492] v3.13-rc8 nv4e + msi = random lockups

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--- Comment #8 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Looks like the nv4x igp's have some registers placed differently... I just cc'd
you on a few patches, you can also get them at:

http://lists.freedesktop.org/archives/nouveau/2014-February/016032.html
http://lists.freedesktop.org/archives/nouveau/2014-February/016033.html
http://lists.freedesktop.org/archives/nouveau/2014-February/016034.html

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[Bug 74492] v3.13-rc8 nv4e + msi = random lockups

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--- Comment #9 from Ronald <ronald645-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
I noticed, thanks!

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[Bug 74492] [NV4E] v3.13-rc8 nv4e + msi = random lockups

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https://bugs.freedesktop.org/show_bug.cgi?id=74492

Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|v3.13-rc8 nv4e + msi =      |[NV4E] v3.13-rc8 nv4e + msi
                   |random lockups              |= random lockups

--- Comment #10 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
(In reply to comment #9)
> I noticed, thanks!

Were you able to test them out? Would be nice to confirm if they actually work
as advertised. Although I do tend to trust mwk on such things :)

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[Bug 74492] [NV4E] v3.13-rc8 nv4e + msi = random lockups

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--- Comment #11 from Ronald <ronald645-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
It's on my TODO list together with bug #70213. The laptop is being used right
now, so this could take a while.

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[Bug 74492] [NV4E] v3.13-rc8 nv4e + msi = random lockups

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--- Comment #12 from Ronald <ronald645-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Patches applied, let's hope for the best.

Furthermore, hibernate seems to work with this laptop! After the enablement of
the kernel DRM for the nouveau driver this was not the case anymore. Up until
now... progress!

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[Bug 74492] [NV4E] v3.13-rc8 nv4e + msi = random lockups

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--- Comment #13 from Ronald <ronald645-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
It went berserk shortly after the last post. I have the laptop hooked up to
another machine with netconsole.

Last time it gave so much OOPSES BUGS and WARNS, well that should keep you all
busy for the next week :) .

Bug is hard to reproduce, this might take a while. It happens mostly while
scrolling. Starts with parts of the screen not updating keeping stale contents
of before the scroll.

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[Bug 74492] [NV4E] v3.13-rc8 nv4e + msi = random lockups

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--- Comment #14 from Ronald <ronald645-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
It does not seem to send the errors over netconsole. It crashed twice this
morning using a git pull from 2 hours ago. No output :/ . I'll keep trying
though.

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[Bug 74492] [NV4E] v3.13-rc8 nv4e + msi = random lockups

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--- Comment #15 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Is the system solid without MSI? Maybe we should just give up and disable MSI
on it. NVIDIA never shipped drivers with MSI enabled for pre-nv50.

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[Bug 74492] [NV4E] v3.13-rc8 nv4e + msi = random lockups

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--- Comment #16 from Ronald <ronald645-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Yes, it never crashed with MSI disabled. I have the laptop hooked up anyway so
I will still try hoping it will be able to send out what is going wrong.

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[Bug 74492] [NV4E] v3.13-rc8 nv4e + msi = random lockups

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--- Comment #17 from Ronald <ronald645-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Created attachment 94413
  --> https://bugs.freedesktop.org/attachment.cgi?id=94413&action=edit
Partial output from hang with MSI enabled

I managed to capture some output during a hang. It's not much.

The music stops playing when the pfifo warnings show up. Then it starts playing
and stops at the next pfifo warning.

Should I enable more verbose nouveau logs?

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[Bug 74492] [NV4E] v3.13-rc8 nv4e + msi = random lockups

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Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #18 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
(In reply to Ilia Mirkin from comment #15)
> Is the system solid without MSI? Maybe we should just give up and disable
> MSI on it. NVIDIA never shipped drivers with MSI enabled for pre-nv50.

MSI should be disabled for NV4C and NV4E in semi-recent kernels.

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